Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Goldman Sachs
GS
|
+$40.4M |
| 2 |
NVIDIA
NVDA
|
+$23.1M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$21.5M |
| 4 |
Wells Fargo
WFC
|
+$20.8M |
| 5 |
Micron Technology
MU
|
+$20M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Citigroup
C
|
+$21.4M |
| 2 |
Apple
AAPL
|
+$15.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$14.4M |
| 4 |
Eli Lilly
LLY
|
+$10.5M |
| 5 |
iShares Biotechnology ETF
IBB
|
+$8.06M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 9.73% |
| 2 | Communication Services | 9.25% |
| 3 | Consumer Discretionary | 8.76% |
| 4 | Healthcare | 8.53% |
| 5 | Financials | 7.38% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
AGN
276
PUT
DELISTED
Allergan plc
AGN
| $1.45M | 0.06% |
2,837
-186
| -6% | -$43.3K |
|
|
DATA
277
DELISTED
Tableau Software, Inc.
DATA
| $1.44M | 0.06% |
29,151
+25,429
| +683% | +$1.26M |
|
278
PUT
Intel
INTC
$516B
| $1.44M | 0.06% |
4,675
+1,806
| +63% | +$65.4K |
|
|
UWC
279
CALL
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $1.43M | 0.06% |
807
-263
| -25% | -$466K |
|
280
ProShares UltraPro QQQ
TQQQ
$34.1B
| $1.43M | 0.06% |
388,896
-487,200
| -56% | -$1.61M |
|
281
iShares 7-10 Year Treasury Bond ETF
IEF
$47.1B
| $1.43M | 0.06% |
13,519
+3,747
| +38% | +$394K |
|
|
WCG
282
DELISTED
Wellcare Health Plans, Inc.
WCG
| $1.43M | 0.06% |
+10,173
| New | +$1.45M |
|
283
iShares China Large-Cap ETF
FXI
$4.29B
| $1.42M | 0.06% |
+37,008
| New | +$1.39M |
|
284
Helmerich & Payne
HP
$3.52B
| $1.42M | 0.06% |
+21,390
| New | +$1.52M |
|
285
Nutanix
NTNX
$14.4B
| $1.42M | 0.06% |
+75,760
| New | +$2.03M |
|
|
286
PUT
Wells Fargo
WFC
$262B
| $1.41M | 0.06% |
10,010
+1,867
| +23% | +$106K |
|
287
Sarepta Therapeutics
SRPT
$1.67B
| $1.41M | 0.06% |
+47,481
| New | +$1.47M |
|
288
CALL
Direxion Daily Technology Bull 3x ETF
TECL
$5.56B
| $1.4M | 0.06% |
24,300
-12,120
| -33% | -$73.3K |
|
289
Unilever
UL
$133B
| $1.4M | 0.06% |
25,220
+12,936
| +105% | +$654K |
|
|
LSI
290
DELISTED
Life Storage, Inc.
LSI
| $1.4M | 0.06% |
25,518
+25,480
| +67,053% | +$1.43M |
|
|
HCR
291
DELISTED
Hi-Crush Inc. Common Stock
HCR
| $1.39M | 0.06% |
80,003
+76,808
| +2,404% | +$1.42M |
|
292
Fomento Económico Mexicano
FMX
$44.6B
| $1.38M | 0.06% |
15,634
+3,081
| +25% | +$251K |
|
293
Hartford Financial Services
HIG
$38.6B
| $1.35M | 0.06% |
28,172
+21,712
| +336% | +$1.05M |
|
294
CALL
Regeneron Pharmaceuticals
REGN
$68.3B
| $1.35M | 0.06% |
875
+74
| +9% | +$27.4K |
|
|
SKX
295
DELISTED
Skechers
SKX
| $1.35M | 0.06% |
49,237
+40,877
| +489% | +$1.06M |
|
|
RDUS
296
DELISTED
Radius Health, Inc.
RDUS
| $1.34M | 0.06% |
+34,732
| New | +$1.46M |
|
297
Twilio
TWLO
$27.8B
| $1.34M | 0.06% |
+46,459
| New | +$1.4M |
|
298
Applied Optoelectronics
AAOI
$8.87B
| $1.33M | 0.06% |
+23,769
| New | +$938K |
|
|
RAD
299
PUT
DELISTED
Rite Aid Corporation
RAD
| $1.32M | 0.06% |
273
-213
| -44% | -$25.6K |
|
300
International Flavors & Fragrances
IFF
$19.7B
| $1.32M | 0.06% |
9,947
+7,493
| +305% | +$920K |
|
Similar funds
Simplex Trading's Q1 2017 Portfolio in Review
As of Q1 2017, Simplex Trading held 7,485 positions worth $2.31B, up 38% from $1.67B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading deployed $551M of net new capital in Q1 2017, opening 1,662 new positions and adding to 2,374 existing holdings. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 179,511 shares worth $21.7M.
By sector, the portfolio is most concentrated in Technology at 9.7% of assets, up from 7.2% a quarter earlier, followed by Communication Services and Consumer Discretionary.
On the sell side, the largest reduction was Citigroup, an estimated $21.4M trimmed.
- Simplex Trading's largest Q1 2017 buy was iShares 20+ Year Treasury Bond ETF: 179,511 shares worth $21.7M.
- Simplex Trading added most to Goldman Sachs in Q1 2017, an estimated $40.4M increase.
- Simplex Trading's biggest Q1 2017 reduction was Citigroup, cutting an estimated $21.4M.
- Simplex Trading fully exited Invesco QQQ Trust in Q1 2017, selling an estimated $14.4M.
- Simplex Trading's ten largest holdings make up 18% of its $2.31B portfolio in Q1 2017.
- Simplex Trading opened 1,662 new positions and closed 1,369 in Q1 2017.
- Simplex Trading's portfolio value rose 38% quarter-over-quarter to $2.31B.
Based on Simplex Trading's 13F filing for Q1 2017, filed 21 Apr 2017.